Amazon.com: YXGOOD 10 Pieces Tungsten Carbide Double Cut Rotary Burr Set with 3 mm (1/8 Inch) Shank and 6 mm (1/4 Inch) Head Size (Style 1) : Industrial & Scientific
Tungsten carbide burs (cone) – DLCexpress
Tungsten Carbide Bur Sets for sale at SUVA Lapidary Supply